<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <div align="center">
        <h1>我的第一个网页！</h1>
        <button>你别按我</button>
        <img src="sllh.jpg">
    </div>

</body>
</html>